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| author | Takamori Yamaguchi <takamori.yamaguchi@jp.sony.com> | 2012-11-08 15:53:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-11-09 06:41:47 +0100 |
| commit | b0a8cc58e6b9aaae3045752059e5e6260c0b94bc (patch) | |
| tree | 9c699b9a9bdeeb940b2e96b4cd5325061dd28b02 /mm/dmapool.c | |
| parent | 848561d368751a1c0f679b9f045a02944506a801 (diff) | |
| download | blackbird-op-linux-b0a8cc58e6b9aaae3045752059e5e6260c0b94bc.tar.gz blackbird-op-linux-b0a8cc58e6b9aaae3045752059e5e6260c0b94bc.zip | |
mm: bugfix: set current->reclaim_state to NULL while returning from kswapd()
In kswapd(), set current->reclaim_state to NULL before returning, as
current->reclaim_state holds reference to variable on kswapd()'s stack.
In rare cases, while returning from kswapd() during memory offlining,
__free_slab() and freepages() can access the dangling pointer of
current->reclaim_state.
Signed-off-by: Takamori Yamaguchi <takamori.yamaguchi@jp.sony.com>
Signed-off-by: Aaditya Kumar <aaditya.kumar@ap.sony.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/dmapool.c')
0 files changed, 0 insertions, 0 deletions
